/*
 * Copyright (c) 2020 - present, Inspur Genersoft Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package com.inspur.edp.metadata.rtcustomization.servermanager.dac;

import com.inspur.edp.metadata.rtcustomization.servermanager.utils.MetadataStorageUtils;
import io.iec.edp.caf.commons.utils.SpringBeanUtils;
import lombok.Data;
import org.springframework.orm.jpa.SharedEntityManagerCreator;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;


/**
 * @author zhaoleitr
 */
@Data
public class CustomizationDataProducer {

    @PersistenceContext
    private EntityManager em;

    private static final ThreadLocal<EntityManager> entityManagerHolder = new ThreadLocal<>();

    public EntityManager getEm() {
        // 非文件化，使用默认EntityManager
        if (!MetadataStorageUtils.isUsingSecondDatasource()) {
            return em;
        }

        // 文件化，使用MemoryEntityManager
        if (entityManagerHolder.get() == null) {
            EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(
                    (EntityManagerFactory) SpringBeanUtils.getBean("MemoryEntityManager"));
            entityManagerHolder.set(em);
        }
        return entityManagerHolder.get();
    }
}
